Below is an example:
When you run the campaign with the bid price $0.05, you will see the bid price for all the sites is $0.05 in the report.
Click on the editing icon beside the price, you can adjust the bid price by changing the bid price.
eg. the original price is $0.1. You can change the bid price of this site to $0.2.
If you change the campaign bid price, the bid price for those specific sites which you have changed the bid in the report will still remain as you set in report .
The bid price in the report will always be the latest bid price you have set.